The Bosch Rexroth Indramat KDA 2.1-150-3-LQS-U1 spindle drive from the Bosch Rexroth Indramat KDA Spindle Drives series delivers precision control and robust performance for demanding machining applications. Engineered as part of the KDA Spindle Drives family, this unit provides continuous torque and high stiffness across an extensive speed range. With integrated positioning features and broad speed regulation, it excels in tasks requiring rapid acceleration and deceleration. The modular design ensures streamlined installation and straightforward integration into existing CNC environments.
The drive operates on a DC Bus Voltage of 300 V and sustains a Rated Current of 150 A, delivering reliable power for mains-intensive spindle loads. Thermal management is handled by a Cooling system that is Forced Cooled by Heatsink Blower, backed by an AC Supply Source for Heatsink Blower at 115 VAC. Precision feedback is achieved via an Aux. Encoder Input that accommodates 1V Sinusoidal Encoder signals, while the Aux. Interface leverages a Serial Interface RS 232 C for parameterization and monitoring. Speed commands are communicated through a Speed Command Value channel using the SERCOS - Interface, ensuring deterministic cycle times. The drive’s frame Design is classified as 1, with the Product designation of KDA and a Series identifier of 2.
Engineers benefit from the drive’s scalable architecture and standardized interfaces, which simplify integration with multi-axis CNC controllers. The robust forced-cooling arrangement and precision encoder coupling enhance operational reliability under high-duty cycles. Ideal for high-speed spindles in milling, grinding, and drilling operations, the KDA 2.1-150-3-LQS-U1 offers consistent performance, reduced maintenance, and seamless compatibility with Rexroth automation ecosystems.
AC Supply Source for Heatsink Blower
115 VAC
Aux. Encoder Input
With Aux. Encoder Input for 1V Sinusoidal Enc.
Aux. Interface
Serial Interface RS 232 C
Cooling
Forced Cooled by Heatsink Blower
DC Bus Voltage
300 V
Design
1
Product
KDA
Rated Current
150 A
Series
2
Speed Command Value
SERCOS - Interface